These wires are designed to work with LS1 LS2 LS3 LS6 LS7 LT1 LT4 needing 45 degree ends. These features 10mm thick High Performance LS Racing Spark Plug Wires, Extra fiberglass sleeve installed for heat protection, and only 500 OHMS of Resistance per a foot. The overall Wire Length is 10" Be Sure & Check your Factory Length Before Ordering. Spiral core eliminates radio frequency interference (RFI) and is recommended when using a multi spark discharge, electronic ignition systems and other electronic components. Features two-layer 100% silicone inner core & outer jacket keeps the wires flexible for the life of your vehicle maintaining its vibrant color with heat protection to 600º F. With the added Fiberglass exterior sleeve. 500 ohms per foot resistance which provides more fire power to the spark plugs than OEM resistor core wires and has up to 10 times less resistance than standard resistor core wires